﻿/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

namespace Sys.Workflow.Engine.Delegate
{

    /// 
    public interface IExpression
    {

        /// <summary>
        /// 
        /// </summary>
        /// <param name="variableScope"></param>
        /// <returns></returns>
        object GetValue(IVariableScope variableScope);

        /// <summary>
        /// 
        /// </summary>
        /// <param name="value"></param>
        /// <param name="variableScope"></param>
        void SetValue(object value, IVariableScope variableScope);

        /// <summary>
        /// 
        /// </summary>
        string ExpressionText { get; }
    }
}